This Pumpkin Puree Recipe Turns One Pie Pumpkin Into a Full Can

A 3 pound pie pumpkin roasted at 400°F gives you about 2 cups of puree, a little more than the 1¾ cups packed into a standard 15 oz can. That's the whole pitch for this pumpkin puree recipe: one small pumpkin covers one pie, with a few spoonfuls left over for your oatmeal.

The catch is money and time, not skill. You'll spend about an hour, most of it hands off, and you'll probably pay a bit more per ounce than the can costs. Below are the weights, the gram conversions and the honest cost math, so you can decide whether homemade is worth it this October.

How to make pumpkin puree from one pie pumpkin

Start with a small sugar pumpkin, the kind stores label as a pie pumpkin. Kristine's Kitchen's tested method uses a 2.5 to 3 pound pumpkin and gets about 2 cups of puree out of it. Weigh yours on the produce scale before you buy, because that number tells you roughly how much puree you'll end up with.

Pumpkin pie sugar pumpkin or a carving pumpkin?

Go with the sugar pumpkin for pumpkin pie. Carving pumpkins are grown for size and thin walls, so their flesh cooks up stringy and watery. A pie pumpkin is small and dense, and that density is exactly why a 3 pound one can match a whole can.

Should you drain it?

Only if it looks loose. Homemade batches vary in water content, and a runny puree can keep a custard pie from setting. If a spoonful slumps flat on a plate, let it sit in a fine sieve until it stops dripping, then weigh it again before you measure.

One 3 pound pie pumpkin gives about 2 cups of puree. A 15 oz can holds about 1¾ cups. So one pumpkin covers one pie, with a little to spare.

What a cup of puree weighs in grams, plus every fraction

A cup of plain canned puree weighs 245 grams, according to the GramsInACup conversion chart. King Arthur Baking uses a lighter 227 grams per cup, so if your recipe already prints grams, follow the recipe's number instead of converting it.

The can row is the one that trips people up. The label says 425 grams, and 1¾ cups at 245 grams works out to about 429 grams, so the two agree within a spoonful. Need an odd amount in ounces? Our grams to ounces converter handles it.

Why cups drift with homemade puree

A cup measure only works if your puree is as dense as canned. Thick homemade puree packs more into the cup and a wetter batch packs less. Weighing skips that problem entirely, the same reason grams and milliliters are rarely equal for most ingredients.

Canned pumpkin or homemade, here's what the money says

Canned pumpkin wins on price. Target lists a 15 oz can of Libby's 100% Pure Pumpkin at $2.39, which is $0.16 an ounce. Small sugar pie pumpkins run $3 to $5 each at patches and farm stands, according to a 2026 price guide from Pumpkin Patches Near Me.

So one pumpkin costs you somewhere between 60 cents and $2.60 more than the can it replaces, plus an hour. What you get for that is control over flavor and texture, plus a tray of seeds to roast. Baking a single pie on a busy weeknight? Buy the can.

At $0.16 an ounce, canned pumpkin is hard to beat. A $3 pie pumpkin lands close at about $0.17 an ounce, while a $5 one nearly doubles the cost.

When homemade actually saves money

The break-even price for a 3 pound pie pumpkin is about $2.75, since that's what 17.3 ounces of canned pumpkin costs at $0.16 an ounce. Pay less than that and homemade is cheaper. Pumpkins sold at a flat price get cheaper per ounce as they get heavier, so pick the heaviest one in the bin.

How to make pumpkin for pie that bakes like the can

Libby's famous recipe, the canned pumpkin pie recipe printed on the label, is built around exactly one 15 oz can, as the version posted on Food.com shows. Swap in 425 grams of your own puree and nothing else has to change.

Bake at 425°F for 15 minutes, then drop to 350°F for another 40 to 50 minutes, until a knife near the center comes out clean. It serves 8. Don't push it past that point, because an overbaked custard cracks down the middle.

Homemade pumpkin pie from pumpkins you roasted

A homemade pumpkin pie from pumpkins you roasted yourself can bake up softer if the puree ran wet. Start checking at 40 minutes and trust the knife over the timer. Planning the rest of the feast too? Here's how much turkey per person you need.

Storing fresh pumpkin puree by weight

Kristine's Kitchen keeps homemade puree in the fridge for up to 7 days and in the freezer for 3 to 4 months, both in airtight containers. Freeze it in portions and label each bag in grams, not cups, so you can grab exactly one can's worth in November.

Label frozen puree in grams. A bag marked 425 g is one can, with no measuring cup and no guessing.

Check your scale before a big bake day. A two minute calibration with a nickel keeps small errors from stacking up across several pies.

Quick answers before you start this pumpkin puree recipe

How much puree is in a 15 oz can of pumpkin?

About 1¾ cups, or 425 grams by the label. At 245 grams per cup that's about 429 grams by volume math, close enough to treat as the same amount.

What is 1 cup pumpkin puree in grams?

One cup of plain puree is 245 grams on the GramsInACup chart. Some bakers, including King Arthur Baking, use 227 grams, so stick with whatever figure your recipe prints.

What's a good pumpkin puree substitute?

Mashed butternut squash or sweet potato is the usual swap, and you can use it gram for gram. Roast and blend it the same way, then weigh out 425 grams to replace one can.

Roasting a pie pumpkin and wondering how much puree it'll give you? Download Scale for Grams and get an AI-powered weight estimate from a photo in seconds, before you even pick up a knife. Get the app here: iOS.